Question

a machine raises a load of 100kg to a height of 15m in 5s .find(1) the enargy spent by the machine (2) the power developed by the machine​

Answer 1

Given:

Machine raises a load of 100 kg to a height of 15 m. Time taken is 5 sec.

To find:

• Energy spent by the machine

• Power developed by the machine.

Calculation:

Energy spent by the machine will be equal to the the potential energy stored into the object at the specified height.

$work = m \times g \times h$

$= > work = 100 \times 10 \times 15$

$\boxed{ = > work = 15000 \: J }$

Power developed by the machine will be equal to the ratio of the work done to the time taken by the machine.

$power = \dfrac{work}{time}$

$= > power = \dfrac{15000}{5}$

$\boxed{ = > power = 3000 \: watt}$

Hope It Helps.